Disk-holder



R. COLLEY.

DISK HOLDER.

APPLICATION FILED SEPT-19,1919.

1,846,004, Patented July 6, 1920.

2 SHEETSSHEET I.

;Ea2 oh GoZZey I IVITNESS: J; /0 INVENTOR.

A TTORNE Y.

R. COLLEY.

DISK HO-LDER.

APPHCATION FILED SEPT. 19, 1919.

1,346,004. Patented July 6, 1920.

2 SHEETS-SHEET 2.

g l l H WWI WITNESS; v l INVENTOR.

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ATTORNEY.

UNITED RALPH COLLEY, G33 TONICA, ILLINOIS.

DISK-HOLDER.

Specification of Letters Patent.

Patented July 6, 1920.

Application filed September 19, 1919. Serial No. 324,787.

This invention relates to the grinding art and has for its object theprovision of a holder whereby the disk of a harrow may be iirmly andproperly held in position to be acted upon by a rotary grinding devicewhereby the disk may be sharpened and properly dressed.

An important object is the provision of a device of this character whichwill be simple and inexpensive in manufacture, highly eiiicient inservice, durable in use, and a gene :11 improvement in the art.

lVith the above and other objects and advantages in view, the inventionconsists in the details of construction to be hereinafter more fullydescribed and claimed, and illustrated in the accompanying drawings inwhich- Figure l is a plan view of my device showing it associated with agrinder,

Fig. 2 is a side elevation thereo'l Fig. 3 is a plan view of the holderwith the disk removed,

Fig. 4 is a detail cross sectional view through the axle support for thedisk, showing the disk in one position.

Fig. 5 is a similar View showing the disk supported in the reverseposition, and

Fig. 6 is a side elevation of the holder frame.

Referring more particularly to the drawings, the letter A designates asupporting table or bench upon which is mounted any preferred orsuitable form of grinder 13 having an abrasive wheel C.

.lvi'y invention resides in the provision of a holder formed as atriangular shaped frame 10 formed of metal and having preferably woodenhandles 11. This frame includes a plate 12 through which extends acircular hole 13.

In order that a barrow disk D may be properly supported upon my device,I provide an axle member M which is cylindrical and either end of whichis adapted for insertion within the hole 13. Intermediate its ends theaxle 14 is provided with a frusto py 'amidal enlargement 15 adapted forengagement within the square opening E provided centrally within thedisk D. Adjacent the enlargement 15 the axle 1% is threaded, as shown at16, and engageable upon this threaded portion is a clamping cup member17 adapted to engage the disk D for forcing the same onto the inclinedsides of the enlargement 15.

In the operation of the device the disk D is placed upon the axle 14with either its convex or concave sides disposed toward the enlargement15 and the cup member 17 is threaded onto the axle member into firmlyclamping engagement with the disk. Either end of the axle member 1% isthen inserted into the hole 13 in the holder, de pending upon which sideof the disk it is desired to sharpen. The parts being thus assembled theoperator grasps the handles 1.1 and tilts the frame 10 upon its point tobring the edge of the disk in engagement with. the grinding wheel C. Itwill be readily observed that the device may be tilted as desired orrequired to bring different points on the periphery of the disk intoengagement with the wheel. It will also be observed that the disk willbe rotated to a certain extent by the action of the grinding wheel sothat the entire edge of the disk will be properly dressed. After oneside is sharpened the operator removes the disk and axle member as awhole and .inserts the other end of the axle member into the holder tobring the other side of the disk uppermost after which the sameoperation is stone through with.

While I have shown and described the preferred embodiment of myinvention it is of course to be understood that I reserve the right tomake such changes in the form, construction, and arrangement of parts aswill not depart from the spirit of the invention or the scope of thesubjoined claim.

Having thus described my invention, I olai1n:-

A device of the character described comprising a frame provided withhandles, a plate secured upon said frame and pro vided with a hole, anaxle member cylindrical and of the same diameter at each end with eitherend insertible within said hole, a frnsto -pyramida1 enlargement formedupon said axle member intermediate the ends thereof and adapted forconforming engagement With the square .hole Vpr0- .vided in the centerof barrow disks, said axle member being provided adjacent saidenlargement With a threaded portion, and a cup member engaged upon saidthreaded portion and adapted to bear againsta harrow disk engaged uponsaid :aXle against 10 said enlargement, said cup member having anannular portion engageable by a Wrench. In'testimony whereof I aflix mysignature.

RALPH COLLEY.

